where \(A_{eff}\)  is the effective collecting area of each antenna, \(\Delta \Omega = (\Delta \theta )^2\)  is the beam solid angle, \(T_{sys}\)  is the system temperature and \(c\)  is the speed of light. We have chosen \(\Delta t_c=120\)  seconds. We carry out the following steps to generate the noise maps [1]}:
